Cleaning and scouring attachment for metal rolls.



J. DUNL01 & J. D. DAVIDSON.

CLEANING AND SGOURING ATTACHMENT FOR METAL ROLLS.

APPLICATION I'ILED NOV. 8, 1911 1,094,202, Patented Apr. 21', 1914.

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J. DUNLOP & J. D. DAVIDSON. CLEANING AND scounme ATTACHMENT FOR METALROLLS. APPLICATION FILED NOV. 8, 1911.

1,094,202. Patented Apr. 21, 1914.

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J; DUNLOP & J. D. DAVIDSON. CLEANING AND scounme ATTACHMENT FOR METALROLLS. APPLICATION FILED NOV. 8, 1911.

1,094,202. Patented Apr. 21, 1914.

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UNITED STATES PATENT orrucn.

JOHN DUNLOP AND JESSE D. DAVIDSON, OF WELLSVILLE, OHIO.

CLEANING AND SGOURING- ATTACHMENT FOR METAL ROLLS.

To all whom, it may concern Be it known that we, JOHN DUNLOP and JesseD. DAVIDSON, citizens of the United States, and residents of Wellsville,in the county of Columbiana and State of Ohio, have invented an ImprovedCleaning and Securing Attachment for Metal Rolls, of which the followingis a specification.

Our invention is particularly intended for cleaning and scouring thesurface of metal rolls used for rolling steel plates or sheets. Suchrolls become more or less rough and uneven, with the result that thesheets passing through the mill are not fiat and smooth, but rough anduneven, and are hence thrown out at the assorting table. By a methodstill in use, such rolls are scoured and smoothed by means of an emeryblock which is pressed against a roll by a long lever manipulatedmanually. This method is expensive, since it requires the labor of aman, and the mill must remain idle until the operation is completed, andit is also unsatisfactory in that the rolls are not faced uniformly buthollowed or grooved in places. Our apparatus is automatic and producesa. roll face which is smooth and uniform, steel sheets being rolledflat, without stopping the normal operation of the mill, so that animportant economy and perfect mechanical result are effected andproduced.

The details of construction, arrangement, and operation of theattachment are as hereinafter described, and illustrated in theaccompanying drawings, in which- Figure 1 is a face view of a rollingmill with our improved attachment applied thereto. Fig. 2 is an endview. Fig. 3 is a view illustrating in vertical elevation and in sectionthe chief portions of our attachment. Fig. 4. is a perspective view of apolygonal feed bar, together with the carrier for the grinder or scourerand the screw for feeding the same right or left. Fig. 5 is a face viewof an end collar applied to the polygonal feed bar. Fig. 6 is aperspective view of the trip-rod for reversing the feed of the grindercarrier. Fig. 7 is a perspective view of a supporting head for one ofthe polygonal feed bars. Fig. 8 is a vertical section of the feed barand feed screw, together with an elevation of the grinder and carriertherefor.

Specification of Letters Patent.

Application filed November 8, 1911.

Fig. 9 is a face view Patented Apr. 21, 1914. Serial No. 659,112.

of the grinder carrier. Fig. 10 is a vertical section illustrating themain portion of the feed reversing mechanism. Fig. 11 is an end View ofthe parts shown in Fig. 10, a portion of the sprocket wheel being brokenaway. Fig. 12 is a face view of a shiftable clutch collar used forreversing the feed.

Referring in the first instance to Fig. l, the numerals 1 and 2 indicateheavy rolls between which steel or other metal plates are passed forrolling them fiat and smooth. These rolls are mounted in a frame orhousing 3, and to them our improved grinding attachment is applied. Twopolygonal bars 4: and 5 are arranged horizontally and parallel in front,and near the point of con tact, of the rolls 1 and 2. On these bars 4:and 5 the heads or carriers for the grinder proper are mounted to slideright and left, the same being indicated by numerals 6 and 7-see Figs. 4and 8.

The grinder, or in other words, the scourer and cleaner 6 which works incontact with the surface of the roll, is held in a dove-tailed slotformed in the nearly vertical face of the carriers 6 and 7. It is heldalways in contact with the roll by means which will be presentlydescribed, and it is reciprocated, alternately right and left, on thefeed-bar by means of a screw-shaft 8 or 8*, there being one applied toeach of the feed-bars 4 and 5 and arranged in a longitudinal groove inthe same, as shown in Figs. 3, 4 and 8.

The approximately cylindrical base or body of the grinder carriers 6 and7 is recessed to receive a nut 9, and a clamp-screw 10 is applied forholding the nut in firm contact with the screw 8 or S At the righthandend, the feed-bars 4: and 5 are supported in the housing 3 by means .ofcollars 11, and at the left-hand end they pass through the other housing3, as shown in Figs. 1 and 3, and project on the left-hand side of saidhousing, as shown.

The polygonal bars 1 and 5 are rotatable around their axes, and, foreffecting this to the extent required for holding the grinder 6 incontact with the rolls 1 and 2, we apply weighted elbow levers 12 and13-see Figs. 2 and 3. Such levers are provided with heads that are fixedon the ends of the polygonal bars 1 and 5, and the weights 12" and 13are applied to the free ends of the levers, so as to obviously turn thegrinder carriers 6 and 7 against the rolls. The contact of the grinderswith the rolls prevents the further rotation of the bars 4 and 5.

It is obvious that the rotation of the feedscrews 8 and 8 requires to bereversed when the grinder carriers 6 and 7 have reached the ends of therolls in either direction. For this purpose, we employ the followingmechanism: As shown in Figs. 1 and 2, a sprocket wheel 14: is aflixed tothe journal of the upper roll 1 and a chain 15 runs therefrom to asprocket-wheel 16 mounted on a. counter-shaft 17 at the head of theleft-hand housing. Thus, this shaft is constantly driven in onedirection. On said shaft are mounted grooved pulleys 1S and on twopulleys 20 and 21 run belts 19, one of which is crossed, as shown inFig. 2. The pulleys 20 and 21 are arranged as shown in Fig. 10, the samebeing mounted loose upon a sleeve 22 which is mounted rotatably on thecylindrical extension 23 of a head 2a which is applied to the end of theupper polygonal bar 4- that projects from the housing. Such head has apendent portion 24 which serves as a guide and support for tripmechanism that will be presently described.

The upper feed-screw S has a journal or cylindrical extension 8 which,as shown in Fig. 10, passes through the cylindrical extension 23 of thehead 24: and projects from it, the projecting portion being reduced andmade polygonal. The sleeve 22, which is free to rotate on the journal23, is secured to the screw journal 8" by means of a clampscrew 25. Thusthe sleeve and the upper feed-screw 8 rotate together, and, since thefeed-screw is provided with a cylindrical collar 26 that abuts shoulderon the head 2a, the sleeve is held on the hollow journal 23.

A sprocket-wheel 27 is fixed on the outer end of the sleeve 22 and fromit a chain 28 runs to a sprocket 29 that is fixed on the lower feedscrew 8 It will thus be apparent that in whichever direction the sleeve22 is rotated, the lower feed-shaft will be also rotated in the samedirection.

Between the two grooved loose pulleys 20 and 21, we arrange acylindrical clutch 30- see Figs. 10 and 12and the same is mounted on afeather 31, so that it rotates with the sleeve 22, but may be shiftedright or left thereon in order to bring it into engagement with eitherof the pulleys 20 or 21. It is apparent that when incontact with one ofthe pulleys, the screws 8 and 8 will be driven in one direction and whenthe clutch is shifted in contact with the other pulley, the screws willbe driven in the opposite direction.

To effect the shifting of the clutch, which must occur when the grindersreach the ends of the rolls, we employ trip mechanism whose constructionand operation are as follows: A bent arm 32sec Figs. 1, 3, 10 and 11- ishrovided at its upper end with a fork adapted to enter a circumferentialgroove in the slidable clutch 30. The horizontal. member of this bentarm is pivoted to a lever 33 which is fulcrumed at M on the pendant 24;,and to the upper end of such lever is pivoted a trip-rod 35-see Figs. 3,i, and (5. This trip-rod is adapted to slide in a groove formed in theunder side of the upper polygonal bar l, and at suitable points it isprovided with a series of tapped holes, any one of which tapped holes isadapted to receive screws 36 which serve as stops for limiting themovement of the grinder carriers in either direction.

It will now be understood that when the grinder carrier (3 approachesone end of the roll 1, it will come in contact with the lefthandscrew-stop and thereby shift the triprod 35 to the left, which will inturn tilt the lever 33 and thus, through the medium of the bent arm 32,shift the clutch. 3O correspondingly, with the ultimate result that theclutch will be removed from contact with one of the pulleys and carriedinto engagement with the other one, thus finally changing the rotationof the two screws 8 and S,

so that the grinder carriers (3 and 7 begin their reverse movement. Itis further apparent that this operation is uniformly repeatedautomatically at the end of the reciprocating movements of the grindercarriers. The holes provided in the trip-rod enable the screw-stops tobe shifted as may be required by rolls of different lengths or to meetother conditions.

In Fig, 10, we illustrate a means for holding the clutch-shifting rod 82in either of the two bositions to which it may be shifted. It will beseen that the horizontal arm of such rod slides in a hole 37 provided inthe pendent extension 24 of the head 24,-, and that such arm is providedwith two adj accnt recesses 88 which are adapted to receive a conicalpoint 89 which is supported upon a screw 40, a spring 4E1 beinginterposed between them. In effect this device is a springstop which,while serving to hold the clutchrod from accidental movement in eitherdirection, yet permits it to be shifted forcibly through the medium ofthe trip-rod 35, as already described.

In Figs. 8 and 9, we illustrate an attachment to the grinder carrierwhich consists of a pocket or receptacle L2 and a scraper 43, the latterbeing a thin steel blade whose free end works in contact with theperiphery of a roll and thus scrapes and cleans the same, the materialremoved by it falling into the pocket, from which it may be removed atintervals as required. The pocket is formed of sheet metal, its sidesbeing parallel and projecting inward and secured to the circular body ofthe grinder carrier, as indicated.

It is obvious that in place of the horizontal bars 4 and 5, which aredescribed as polygonal, various other forms of bar may be employed, andwe do not desire to limit our invention in this particular.

e have described belt gearing for rotating the screw-shafts reversely,but desire it understood that we may employ any other suitable means forthis purpose.

What we claim is 1. The combination with a mill roll, of a carrier forthe grinding and cleaning medium, a horizontal polygonal bar on whichsaid carrier is adapted to slide right and left and thus traverse thelength of the roll, a screw shaft, and a nut secured to the carrier andengaging said shaft, the latter being arranged in a longitudinal groovein said polygonal bar, a slidable clutch which is operatively connectedwith the screw shaft, pulleys mounted on the screw shaft journal, meansfor rotating them in opposite directions, a trip operated by the grindercarrier at the end of its movement in either direction, and meansoperatively connecting such trip with the clutch, whereby said clutch isshifted between said pulleys for reversing the rotation of the screwshaft, substantially as described.

2. The combination with a mill roll, of a grinder carrier adapted totraverse the same, a horizontal bar on which the same is mounted toslide, a screw shaft which is operatively connected with the carrier forfeeding it along the supporting bar and provided at one end with acylindrical extension constituting a journal, a sleeve which is clampedto the screw shaft journal, so as to rotate therewith, wheels mountedloose on the sleeve, and means for driving them in opposite directions,a shiftable clutch arranged between such wheels and adapted to slide ona feather connecting it with the sleeve, and trip mechanism forreversing the rotation of the screw shaft and the feed of the grindercarrier, such mechanism operatively connecting the clutch with thegrinder carrier, such mechanism including a rod having stops with whichthe grinder carrier is adapted to come in contact upon reaching thelimits of its traverse, whereby the clutch may be shifted, substantiallyas described.

3. The combination with a mill roll, a grinder carrier, and a horizontalbar supporting the same, of a head provided with a socket adapted toreceive one end of the bar and having a cylindrical hollow extensionconstituting a journal, a screw shaft which is operatively connectedwith the grinder carrier for traversing it on the face of the roll, saidshaft being provided with a cylindrical journal having its bearing inthe journal of the aforesaid head, a sleeve mounted rotatably on thehead journal, and means for clamping it to the journal of the screwshaft, pulleys mounted loose on the sleeve, a clutch arranged betweenthem and adapted to slide on a feather secured to the sleeve, a tripmechanism operatively connecting such clutch with the grinder carrier,whereby when the latter reaches the limits of its traverse in eitherdirection, the clutch is shifted from engagement with one pulley intoengagement with the other pulley, thereby reversing the operation of thescrew shaft, substantially as described.

JOHN DUNLOP. JESSE D. DAVIDSON.

lVitnesses:

F. I. CRUMBACKER, J OHN RIEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

